Monodispersed biocompatible silver sulfide nanoparticles: Facile extracellular biosynthesis using the γ-proteobacterium, Shewanella oneidensis

Suresh, Anil K.; Doktycz, Mitchel J.; Wang, Wei; Moon, Ji Won; Gu, Baohua; Meyer, Harry M.; Hensley, Dale K.; Allison, David P.; Phelps, Tommy J.; Pelletier, Dale A.

doi:10.1016/j.actbio.2011.07.007

Cited by 146 publications

(68 citation statements)

References 44 publications

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“…The electrostatic repulsive forces between the nanoparticles when they are negatively charged possibly protect them from forming an association. This prevents the particles from agglomeration in the medium leading to long-term stability [34]. The AgNPs in the present study were negatively charged with a zeta potential of -50.7 mV (Fig.…”

Section: Zeta Potential Measurementmentioning

confidence: 97%

Efficient and robust biofabrication of silver nanoparticles by cassia alata leaf extract and their antimicrobial activity

et al. 2014

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Biosynthesis of green nanomaterials and their characterization comprise an emerging field of nanotechnology, due to their wide range of applications. The present study deals with the synthesis of silver nanoparticles (AgNPs) using an aqueous leaf extract of Cassia alata. The AgNPs are characterized using UV-Visible spectroscopy. The surface plasmon resonance spectrum of AgNPs was obtained at 434 nm, and scanning electron microscopy coupled with X-ray energy dispersive spectroscopy (EDX) data revealed that AgNPs were uniformly spherical in shape. EDX data show very strong silver signal and weak signals to other elements, and X-ray diffraction patterns reveal that the particles are crystalline in nature with facecentered cubic structure. Fourier transform-infrared spectroscopy reveals that the carbonyl group (C = O, 1637.07 cm -1 ) is involved in the reduction of Ag ? to Ag. The synthesized AgNPs were crystalline in nature and spherical in shape, with an average of [41 nm size. The stability of AgNPs is due to its high negative zeta potential, which is -50.7 mV. Further, atomic force microscopy studies also revealed that the average particle size was 47 nm which correlates with the above result of particle size analysis. The present study also indicates that AgNPs have considerable antibacterial activity and exceptionally superior antifungal activity, in comparison with standard antimicrobial drugs.

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Section: Zeta Potential Measurementmentioning

confidence: 97%

Efficient and robust biofabrication of silver nanoparticles by cassia alata leaf extract and their antimicrobial activity

et al. 2014

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“…This technique results in a mixture of diverse particle sizes and shape distributions and illustrates the diverse NP mixtures that can result from biological and chemical based synthesis methods [11,[20][21][22][23][24]. Therefore this material was used to illustrate the size/shape separations that can be accomplished using simple sucrose density gradient sedimentation.…”

Section: Resultsmentioning

confidence: 99%

“…AgNPs can possess low cytotoxicity, high thermal stability and low volatility [20]. Therefore, uniform monodispersed silver nanoparticles are highly desirable, especially for meeting the needs of these various applications [11,20]. Facile separation of mixed shapes (rods, spheres, triangles pyramids, stars and pentagons) of gold nanoparticles, synthesized using fungus, to discrete shapes using sucrose density gradient using a tabletop centrifuge was demonstrated [7].…”

Section: Introductionmentioning

confidence: 99%

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Size-Separation of Silver Nanoparticles Using Sucrose Gradient Centrifugation

Pelletier¹

2015

J Chromatogr Sep Tech

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“…The luminescent properties, combined with low or absent cytoxicity [158,299], (except for cadmium chalcogenides, broadly used as luminescent quantum dot [20,258,[303][304][305][306][307][308][309][310][311]), make transition metal sulphide appealing candidate probes for optical bioimaging applications and further related bio-applications (e.g., photothermal and/or photodynamic applications [10,312,313]). As we shall extensively discuss in the next section, all these applications require a chemical, photochemical and thermal stable functionalisation.…”

Section: Applications-oriented Functionalisation Of Transition Metal mentioning

confidence: 99%

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

2017

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Abstract:Metal sulphides, and in particular transition metal sulphide colloids, are a broad, versatile and exciting class of inorganic compounds which deserve growing interest and attention ascribable to the functional properties that many of them display. With respect to their oxide homologues, however, they are characterised by noticeably different chemical, structural and hence functional features. Their potential applications span several fields, and in many of the foreseen applications (e.g., in bioimaging and related fields), the achievement of stable colloidal suspensions of metal sulphides is highly desirable or either an unavoidable requirement to be met. To this aim, robust functionalisation strategies should be devised, which however are, with respect to metal or metal oxides colloids, much more challenging. This has to be ascribed, inter alia, also to the still limited knowledge of the sulphides surface chemistry, particularly when comparing it to the better established, though multifaceted, oxide surface chemistry. A ground-breaking endeavour in this field is hence the detailed understanding of the nature of the complex surface chemistry of transition metal sulphides, which ideally requires an integrated experimental and modelling approach. In this review, an overview of the state-of-the-art on the existing examples of functionalisation of transition metal sulphides is provided, also by focusing on selected case studies, exemplifying the manifold nature of this class of binary inorganic compounds.

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Monodispersed biocompatible silver sulfide nanoparticles: Facile extracellular biosynthesis using the γ-proteobacterium, Shewanella oneidensis

Cited by 146 publications

References 44 publications

Efficient and robust biofabrication of silver nanoparticles by cassia alata leaf extract and their antimicrobial activity

Efficient and robust biofabrication of silver nanoparticles by cassia alata leaf extract and their antimicrobial activity

Size-Separation of Silver Nanoparticles Using Sucrose Gradient Centrifugation

Functionalisation of Colloidal Transition Metal Sulphides Nanocrystals: A Fascinating and Challenging Playground for the Chemist

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